package com.kfm.am;

public class FengShan implements Usb<FengShan> {
    @Override
    public void addItem(FengShan item) {

    }
}

class Test03 {

    public static void main(String[] args) {

        FengShan fengShan = new FengShan();
        fengShan.addItem(new FengShan());
    }
}
